[bugfix] registry: register magi_human presets

[alanhuangyoo]

fastvideo/pipelines/basic/magi_human/presets.py defines eight presets, but _register_presets() in fastvideo/registry.py never imports them, so none of them reach the registry:

>>> import fastvideo.registry
>>> from fastvideo.api.presets import get_preset, get_presets_for_family
>>> [p.name for p in get_presets_for_family("magi_human")]
[]
>>> get_preset("magi_human_base", "magi_human")
ConfigValidationError: pipeline.preset: unknown preset 'magi_human_base'
for model family 'magi_human'; registered: (none)

Every other family in that function is wired up; magi_human is the only one whose ALL_PRESETS is missing from both the import block and all_preset_groups. It looks like it was simply missed when the pipeline landed in #1299 — MAGI_HUMAN_PRESETS has never appeared in registry.py in the repo's history.

After this change:

>>> sorted(p.name for p in get_presets_for_family("magi_human"))
['magi_human_base', 'magi_human_base_ti2v', 'magi_human_distill',
 'magi_human_distill_ti2v', 'magi_human_sr_1080p', 'magi_human_sr_1080p_ti2v',
 'magi_human_sr_540p', 'magi_human_sr_540p_ti2v']

tests/local_tests/magi_human/test_magi_human_pipeline_smoke.py::test_magi_human_typed_surface_preflight already asserts exactly this set and has been failing on main; it passes now. Preset counts for the other families are unchanged (ltx2 4, wan 15, zimage 1, flux2 3, minimax_h3 3).

fastvideo/tests/api/ gives 5 failed / 249 passed both with and without this patch — those failures are pre-existing (test_attn_qat_infer_capability_gate, test_schema_parity_inventory) and unrelated.

Env: torch 2.12.0+cu130, H20, single node.

[mergify]

Merge Protections

🔴 1 of 1 protections blocking · waiting on 👀 reviews and 🤖 CI

	Protection	Waiting on
🔴	PR merge requirements	👀 reviews and 🤖 CI

🔴 PR merge requirements

Waiting for

• #approved-reviews-by>=1
• check-success=full-suite-passed

This rule is failing.

• #approved-reviews-by>=1
• check-success=full-suite-passed
• check-success=fastcheck-passed
• check-success~=pre-commit
• title~=(?i)^\[(feat|feature|bugfix|fix|refactor|perf|ci|doc|docs|misc|chore|kernel|new.?model|skill|skills|infra)\]